Changes

As shown on [[:File:Predicting-reservoir-system-quality-and-performance fig9-102.png|Figure 2]], mudstones (B) are micro- to mesoporous; packstones (A) are meso- to macroporous. The mudstones have more pores with smaller pore throats than the packstones. This means mudstones have greater pore surface area and higher immobile S_w. As a consequence, S_w values for mudstones are higher at any given elevation in the oil column.

As shown on [[:File:Predicting-reservoir-system-quality-and-performance fig9-102.png|Figure 2]], mudstones (B) are micro- to mesoporous; packstones (A) are meso- to macroporous. The mudstones have more pores with smaller pore throats than the packstones. This means mudstones have greater pore surface area and higher immobile S_w. As a consequence, S_w values for mudstones are higher at any given elevation in the oil column.

[[file:predicting-reservoir-system-quality-and-performance_fig9-104.png|thumb|{{figure number|3}}. Copyright: Coalson et al., 1994; courtesy RMAG.]]

[[file:predicting-reservoir-system-quality-and-performance_fig9-104.png|thumb|{{figure number|3}}Buckles plot for the Weyburn well. Copyright: Coalson et al., 1994; courtesy RMAG.]]

[[:file:predicting-reservoir-system-quality-and-performance_fig9-104.png|Figure 3]] is a Buckles plot for the Weyburn well. The hyperbolic curves represent equal values of S_w × Φ. Points from the same pore type that fall along a hyperbolic curve are at immobile S_w. Curves with higher values represent higher immobile S_w.

[[:file:predicting-reservoir-system-quality-and-performance_fig9-104.png|Figure 3]] is a Buckles plot for the Weyburn well. The hyperbolic curves represent equal values of S_w × Φ. Points from the same pore type that fall along a hyperbolic curve are at immobile S_w. Curves with higher values represent higher immobile S_w.